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Darcy Friction Factor
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Darcy Friction Factor

Darcy friction factor is proportional to shear stress at pipe/conduit wall as number of velocity heads and is used in momentum transfer in general and turbulent flow calculations in particular. It is equivalent to (4) times Fanning's friction factor. It is normally defined in one of the following forms

 

Darcy Friction Factor

or

Darcy Friction Factor

or

Darcy Friction Factor

or

Darcy Friction Factor

 

Where:

d

=

Diameter

delta-P

=

Pressure drop

dP/dL

=

Pressure drop per unit length

gc

=

Dimensional constant

G

=

Mass velocity

L

=

Length

rho

=

Density

V

=

Velocity

 

unit conversion
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